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LTC4070 Datasheet(PDF) 8 Page - Linear Technology |
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LTC4070 Datasheet(HTML) 8 Page - Linear Technology |
8 / 24 page LTC3108-1 8 31081fa BLOCK DIAGRAM OPERATION The LTC3108-1 is designed to use a small external step-up transformer to create an ultralow input voltage step-up DC/DC converter and power manager. It is ideally suited for low power wireless sensors and other applications in which surplus energy harvesting is used to generate system power because traditional battery power is inconvenient or impractical. The LTC3108-1 is designed to manage the charging and regulation of multiple outputs in a system in which the average power draw is very low, but there may be periodic pulses of higher load current required. This is typical of wireless sensor applications, where the quiescent power draw is extremely low most of the time, except for transmit bursts when circuitry is powered up to make measure- ments and transmit data. The LTC3108-1 can also be used to trickle charge a standard capacitor, supercapacitor or rechargeable battery, using energy harvested from a Peltier or photovoltaic cell. (Refer to the Block Diagram) 31081 BD C1 C2 5M SW 5.25V 1.2V VREF SW VOUT VSTORE VLDO OFF ON VOUT2 VOUT2 VOUT VOUT PROGRAM COUT PGOOD VOUT2_EN VOUT VS1 VS2 PGD VSTORE C1 CIN VIN VLDO CSTORE 1μF 1:100 C2 SYNC RECTIFY REFERENCE VOUT 2.2V CHARGE CONTROL VAUX + – + – ILIM LTC3108-1 1.3Ω 0.5Ω 1M EXPOSED PAD (DFN) 2.2μF GND (SSOP) VREF LDO VREF VBEST |
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